| E | SK | FIXED CONSTRUCTIONS |
| E21 | USK | EARTH OR ROCK DRILLING; MINING |
| E21 | KL | EARTH OR ROCK DRILLING; MINING |
| E21F | UKL | SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINAGE IN OR OF MINES OR TUNNELS [2] |
|
| E21F 1/00 | HGR | Ventilation of mines or tunnels; Distribution of ventilating currents (ventilating rooms or spaces in general F24F) [2] |
| E21F 1/02 | UGR1 | | . | Test models (analogue computers therefor G06G 7/50) |
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| E21F 1/04 | UGR1 | |
| E21F 1/06 | UGR2 | | . . | Duct connections (tube connections in general F16L) |
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| E21F 1/08 | UGR1 | | . | Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators (ventilators per se F04D) |
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| E21F 1/10 | UGR1 | | . | Air doors (doors in general E06B) |
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| E21F 1/12 | UGR2 | | . . | Devices for automatically opening air doors |
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| E21F 1/14 | UGR1 | | . | Air partitions; Air locks (dams E21F 17/103; air locks for foundations E02D) [6] |
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| E21F 1/16 | UGR1 | |
| E21F 1/18 | UGR1 | |
| E21F 3/00 | HGR | Cooling or drying of air (air-conditioning rooms or spaces in general F24F) |
|
| E21F 5/00 | HGR | Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires (dams E21F 17/103; applying liquids or other fluent materials to surfaces in general B05) [6] |
| E21F 5/02 | UGR1 | |
| E21F 5/04 | UGR2 | | . . | Spraying barriers (spray nipples, spraying in general B05B , B05D; picks with arrangement of fluid-spraying nozzles E21C 35/187) |
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| E21F 5/06 | UGR2 | | . . | Fluids used for spraying |
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| E21F 5/08 | UGR1 | | . | Rock dusting; Depositing other protective substances |
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| E21F 5/10 | UGR2 | | . . | Devices for rock dusting |
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| E21F 5/12 | UGR2 | | . . | Composition of rock dust |
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| E21F 5/14 | UGR1 | | . | Fluid barriers or rock dusters made to work by, or at the same time as, shots or explosions |
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| E21F 5/16 | UGR1 | | . | Layers of hygroscopic or other salts deposited on floors, walls, or the like, for binding dust; Deposition of such layers (dust-absorbing materials in general C09K 3/22) |
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| E21F 5/18 | UGR1 | | . | Impregnating walls, or the like, with liquids for binding dust |
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| E21F 5/20 | UGR1 | | . | Drawing-off or depositing dust (methods or apparatus for flushing boreholes E21B 21/00; while slitting E21C 35/22) [1, 7] |
|
| E21F 7/00 | HGR | Methods or devices for drawing-off gases with or without subsequent use of the gas for any purpose |
| E21F 9/00 | HGR | Devices preventing sparking of machines or apparatus (preventing sparking of electric machines or apparatus H01K , H02K) |
| E21F 11/00 | HGR | Rescue devices or other safety devices, e.g. safety chambers, escape ways (breathing aids for curative purposes A61H 31/00; respiratory apparatus A62B 7/00; revival apparatus A62B 33/00) |
| E21F 13/00 | HGR | Transport specially adapted to underground conditions (mine cars B61D; transport in general, loading B65G) |
| E21F 13/02 | UGR1 | |
| E21F 13/04 | UGR1 | | . | in gravity inclines; in staple or inclined shafts |
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| E21F 13/06 | UGR1 | | . | at or adjacent to the working face |
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| E21F 13/08 | UGR1 | | . | Shifting conveyers or other transport devices from one location at the working face to another (guiding mining machines along conveyers for the cut mineral E21C 35/12; in combination with mine roof supports for step-by-step movement E21D 23/00) |
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| E21F 13/10 | UGR1 | | . | Anchorings for conveyers [2] |
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| E21F 15/00 | ZWE |
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| E21F 15/00 | HGR | Methods or devices for placing filling-up materials in underground workings (dams E21F 17/103) [6] |
| E21F 15/02 | UGR1 | | . | Supporting means, e.g. shuttering, for filling-up materials |
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| E21F 15/04 | UGR2 | | . . | Stowing mats; Goaf wire netting; Partition walls |
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| E21F 15/06 | UGR1 | |
| E21F 15/08 | UGR1 | | . | Filling-up hydraulically or pneumatically (hydraulic or pneumatic transport devices B65G; pipes, pipe couplings F16L) |
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| E21F 15/10 | UGR2 | | . . | Hydraulic or pneumatic filling-up machines |
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| E21F 16/00 | HGR | Drainage (keeping dry foundation sites or other areas in the ground E02D 19/00) [2] |
| E21F 16/02 | UGR1 | |
| E21F 17/00 | HGR | Methods or devices for use in mines or tunnels, not covered elsewhere (mine lighting F21 , H05B) [2] |
| E21F 17/02 | UGR1 | | . | Suspension devices for tubes or the like, e.g. for ventilating ducts (supporting pipes, cables or protective tubing in general F16L 3/00 to F16L 7/00) |
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| E21F 17/04 | UGR1 | | . | Distributing means for power supply [2] |
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| E21F 17/06 | UGR2 | | . . | Distributing electric power; Cable networks; Conduits for cables (circuit arrangements for supplying or distributing electric power in general H02J) |
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| E21F 17/08 | UGR2 | | . . | Distributing hydraulic power; Pipe networks for hydraulic liquid (pipe-line systems in general F17D) |
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| E21F 17/10 | UGR2 | | . . | Distributing pneumatic power; Pipe networks for compressed air (pipe-line systems in general F17D) |
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| E21F 17/103 | UGR1 | | . | Dams, e.g. for ventilation [6] |
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| E21F 17/107 | UGR2 | |
| E21F 17/12 | UGR2 | |
| E21F 17/16 | UGR1 | | . | Modification of mine passages or chambers for storage purposes, especially for liquids or gases (storing fluids in natural or artificial cavities or chambers in the earth B65G 5/00) |
|
| E21F 17/18 | UGR1 | | . | Special adaptations of signalling or alarm devices (for elevators, escalators or moving walkways B66B; gas-sensitive devices per se G01N) |
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